Op Amp Slew Rate Considerations

Welcome to the video series The Operational Amplifier - From Abstraction to Reality.

Operational amplifiers are the workhorse of the analog industry. It is straightforward for the engineer to design circuits by using a set of assumptions about the device, and therefore using simple formulas to calculate the values of the surrounding components. However, in the real world, there are limitations and errors that must be understood. This is where reality sets in.

This video details a serious limitation of operational amplifiers, the slew rate. With an op amp, you can have high speed and large signal span, but unfortunately not both at the same time. Compensated op amps are basically integrators and have definite slew rate limitations. It becomes a real challenge when large signal performance is required.

00:00 Intro
00:25 Rise Time vs. Slew Rate
02:05 Compensated Op Amp
02:39 Opamp is an Integrator
03:02 Slew Rate Measurement of a TL072ACP
03:46 Maximum Derivative of a Sinusoid
04:56 Slew Rate Limited Bandwidth Measurement
06:18 Minimum Slew Rate Bandwidth
07:10 How to Get a Better Slew Rate

Operational Amplifiers
Abstraction
Circuit Analysis
Op Amp

[NathanHoch-nrhu]

Thank you so much for making these videos and sharing your wealth of knowledge!